William h



May l, 1928.

, w.H. APPLEBY STEAM HOT PLATE Original Filed June 25, V"1921 wf r @f7-1%; ,l0-4 Wil, #"w. .MTMTHHHWHI INVENTOR 12d l fig/f@ j ATTORNEY Reissuecl May 1, 1928.y

UNITED STATES `rirrnNr omer..

WILLIAM H. APPLEBY, OF BALTIMORE, MARYLAND, ASSIGNOR TOV BETHLEHEM STEEL COMPANY, 0F BETHLEHEM, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

STEAM HOT PLATE.

Original No. 1,490,721, dated April 15, 1924, Serial No. 480,427, led June 25, 1921. Application for reissue led March 25, 1926. Serial No. 97,477.

DIVISION A. y

This invention relates to plates used in presses acting on plastic material which requires heating or cooling during the operation. It embodies a novel plate structure having advantages over those ordinarily used and a novel method of forming it. It is well known that in the manufacture of celluloid sheets, rubber blankets and analogous articles of plastic material, the material is pressed between plates and for convenience and economy in operation the presses used usually embody a series of parallel lates which are simultaneously pressed togetiier with layers of the material between them. The ca acity of a. pressvtherefore depends largely upon the thickness of the plates used, and difliculty has been encountered in making them of the desired thinness on account of the necessity for providing circulating means in them for a heating fluid such as steam or a cooling fluid such as water. Plates made of cast iron with integral ducts for the circulating fluid are necessarily made rather thick. According to the present invention,` forged and preferably rolled steel plates are used and they are not only stronger but their structure and method of formation are such that they may be muchthinner than cast iron plates while furnishing eiciently the necessary means for heating and cooling. They furthermore avoid the objectionable. feature of leaking joints due to contraction and expansion duc to varying temperature encountered in prior cfl'orts to make successful steam plates. The novel features of the invention will be understood from the following description and claims taken with the drawings.

In the drawings: l

Figure 1 is a plan view of the plate with the Huid passageway shown in dotted lines;

Figure 2 is an edge View of the plate on the margin from which the fluid ducts are drilled;

Figure 3 is anedge View from the opposite margin;

Figure 4 is an enlarged section through the entering ends of two adjacent ducts and connecting passageway;

'Figure 5 is a similar view at the otherends of the ducts showing the intermediate socketand connecting passageways, and

throughout the series.

Figure 6 is a view similar to Fig. 4, butshowing a modified form of connection between adjacent tubes.

In making the embodiment of the invention shown, a steel plate 1() is formed by rolling and is rectangular in outline and of a uniform thickness suflicient to have therein a passageway of the desired size for fluid. To provide for circulating fluid through it a series of similar cylindrical parallel ducts 11 are then drilled in the plato from .and at right angles to one. margin marked 12 in Fig.` 1, and terminating in closed ends 13 within the plate near the opposite margin 14. These ducts are of such size in cross section as compared to the thickness of the plate as 'will leave a sufficient thickness lof metal at that line to properly distribute and conduct. heat Afrom or to them. These separate ducts mustbe connected together at alternate endsl in series to form a continuous passageway for the circulation. In the form shown in Figures 1 to 5 they are connected by drilling a socket l5 in and at a. right vangle to the face' of margin 12 midway between two adjacent ducts 117 and then drilling through the bottom of this socket 15 two passagewa-ys 16 and 17 at an angle to the margin and leading into the two adjacent ducts near their ends.l This is shown in detail in Fig. 4. For this purpose the diameterof the socket must be materially greater than the diameter of the DassagcwayS, S0 as to permit the proper entry of the drill at an angle to form the passageways, and is also materially greater than the diameter of the duet 11'. Since however all ot' the duets must not be connected at the same end or margin of the plate in order to secure circulation, but only alternate ducts or pairs, the sockets 15 and passageways 16 and 17 at the margin 12 *are formed between the 'second and third ducts, the fourth and fifth, and so o-n alternately Similar sockets and passageways are formed through the surface.

- of the opposite margin 14 midway between and connecting the closed ends 13 of the first and second and third and fourth ducts, and so on alternately throughout the series as particularly shown in Fig.v 5. Where an uneven number of ducts 11 are formed, they one at one-end of the series may be drilled Cil cession. This permits the fluid supply to have its entrance on oneI side of the plate and the discharge on the other side. The open ends of the ducts 11 are screw threaded and provided with screw plugs 19 as closures, and the engaging screw threaded surfaces may be tapered to make a tight fit. It will be unde-rstood, however, that the open ends of the first and last ducts 11 of the series are not closed but are screw threaded.

to receive and engage the ends of the supply and discharge pipes at 18 and 20, Fig. 1.'

The outer ends of the sockets 1 5 have tapered screw threaded connections with correspondinglv screw threaded plug closures 21, but as illust-rated in Fig. 4 the plugs do not extend to the bottom but when in place leave an open connection between passageways lt'and 17. It will be noted that by this arrangement ofv passageways in the plate, the heating or cooling fluid will pass in a tortuous passage through the plate evenly giving otl' or absorbing heat between the points of connection 18 and 20, and Vthat there are no joints likely to become loose and leaky under the strains of contraction an expansion.

The arrangement of the connecting passageways between adjacent ducts illustrated in detail in Fig. 5 permits one inch ducts to be spaced 31A inches with satisfactory results, and the modified form shown in Fig. 6 permits a spacing two inches. In the form shown in Fig. 6 a socket 22 corresponding to socket 15 in Fig. 4 is drilled in the margin of the plate concentric with hut of materially greater diameter than one duct 11 which constitutes a continuation of it, and a passageway 23 is then drilled at an angle from the bot-tom of that socket into the adjace itV duct 11, and a. single screw threaded plug 24 fitting the outer end of the. socket constitutes a closure not only for the end of the passageway 23 but of the duct leading from the socket.

While the invention has been described with particular reference to forged steel plates, it will. of course, be understood that the invention is not limited to the use of this material, nor is the invention limited to the details of structure or procedure shown. or described,beyond what is .called for in the claims.

That formof the invention, illustrated in Fig. 6 and not Vspecifically covered in the claims of this reiue application. is claimed in the divisional reissue application of this. applicant, 'Serial No. 212,325, filed August Having thus described the invention, what is claimed as new and desired to be secured by Let-ters Patent is:

1. A hot plate for presses comprising a forged steel plate having a plurality of symnietrical parallel ducts drilled therein from one margin to a point near but terminating short of the opposite margin, passageways drilled at an angle to said ducts connecting adjacent ducts within the margin at alternate ends in series and screw plugs closing the open ends of said ducts and'passageways except that at one end of each end duct of the series, the connecting passageways being drilled at an angle from the bottoms of outer cylindrical sockets of a diameter greater than that of the ducts and passageways and which are drilled at right angles to the margin.

224A 4hot plate for presses comprising a forged -steel plate having a plurality of symymet-rical parallel ducts drilled therein from one margin to a point near but terminating short of the opposite margin, cylindrical sockets of larger diameter than said duc-ts drilled in said margins midway of and parallel to alternate pairs of adjacent ducts, connecting passageways drilled from the bottom of each socket at an angle to the ends of the adjacent ducts thus connecting them through the socket, and screw plugs closing the outer ends of said socket-s and all of the outer ends of said .ducts with the exception of the open end of each end duct in the series. l y l 3. A hot plate for presses com rising a metallic plate having a plurality o symmetrical arallel ducts drilled therein from one margin to a point near but terminating short of the opposite margin, passageways drilled at an angle to said ducts connecting adjacent ducts within the margin at alternate ends in series and screw plugs closing the open ends of said ducts and passageways except that at one end of each end duct of the' series, the

' metallic plate having a plurality o symmetrical parallel ducts drilled therein from one margin to a point near but terminating short of the op site margin, cylindrical sockets of larger iameter than said ducts drilled in -said margins midway of and parallel to alternate pairsof adjacent ducts, connecting passageways drilled from the bottom of each socket at an .angle to the ends of the ad'a.- cent ducts thus connecting them through t e socket, and screw plugs closin the outer ends of said sockets and all o the outer ends of said ducts with the exce tion of the open end of each end duct int e series.

5. A hot plate for presses com rising a metallic plate having a. plurality ofsymmetmore rcal parallel ducts drilled therein p ,v

ways drilled at an angle to said ducts com necting adjacent ducts within the margin at alternate ends in series and screw plugs closing the open ends of said ducts and passageways except that at one end of each end duct of the series, the connecting passage ways being drilled at an angle from the bottoms of outer cylindrical sockets of a. diam eter greater than that of the ducts and passageways and which are drilled at right angles to the margin. f

6. A. hot plate for presses comprising a metallic plate, ducts drilled in the plate sub Stantially at an ets formed in t wise at angles to the said edge ofthe plate, passa eways drilled at an los to the plate edge rom the bottoms of e sockets to the ducts, bringing pairs of adjacent ducts into communication, and closure means for the said Sockets.

In testimony whereof I hereunto aix my signature this 18 day of March 1926.

WILLAM EL APPLEBY.

les to an ed thereof, socke margino the plate like-v 

